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moby--moby/distribution/pull_v2_windows.go
John Starks 6b7d028085 Windows: Add debug output to foreign layer pull
Write the foreign layer URLs being downloaded into the debug log.

Signed-off-by: John Starks <jostarks@microsoft.com>
2016-09-26 08:56:34 -07:00

49 lines
1.2 KiB
Go

// +build windows
package distribution
import (
"net/http"
"os"
"github.com/Sirupsen/logrus"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/distribution/registry/client/transport"
)
var _ distribution.Describable = &v2LayerDescriptor{}
func (ld *v2LayerDescriptor) Descriptor() distribution.Descriptor {
if ld.src.MediaType == schema2.MediaTypeForeignLayer && len(ld.src.URLs) > 0 {
return ld.src
}
return distribution.Descriptor{}
}
func (ld *v2LayerDescriptor) open(ctx context.Context) (distribution.ReadSeekCloser, error) {
if len(ld.src.URLs) == 0 {
blobs := ld.repo.Blobs(ctx)
return blobs.Open(ctx, ld.digest)
}
var (
err error
rsc distribution.ReadSeekCloser
)
// Find the first URL that results in a 200 result code.
for _, url := range ld.src.URLs {
logrus.Debugf("Pulling %v from foreign URL %v", ld.digest, url)
rsc = transport.NewHTTPReadSeeker(http.DefaultClient, url, nil)
_, err = rsc.Seek(0, os.SEEK_SET)
if err == nil {
break
}
logrus.Debugf("Download for %v failed: %v", ld.digest, err)
rsc.Close()
rsc = nil
}
return rsc, err
}